Arunachal Pradesh to W. Malesia; Andaman Is., Assam, Bangladesh, Borneo, Cambodia, East Himalaya, Jawa, Laos, Lesser Sunda Is., Malaya, Myanmar, Sumatera, Thailand, Vietnam as per POWO;

NE-India (Assam), Bangladesh, Andaman Isl., Cambodia, Nicobar Isl., Thailand,
Vietnam, Laos, Borneo, Java, Sumatra, Myanmar [Burma] (Taninthayi, Yangon),
peninsular Malaysia (common throughout), Singapore, Panama (I)
as per Catalogue of Life;

Syzyium syzyioides a new distributional record (pdf): 1 post by 1 author. Attachments (1)- 1 mb. 
I attached the pdf of two papers published recently. 
Syzygium syzygioides (Myrtaceae), a new distributional record for Peninsular India- Shareef S.M.- RHEEDEA Vol. 30(2): 307–311 (2020)